Door lock control



y J. A. SALDANA 2,475,757

, DOOR LOCK CONTROL Filed July 8, 1946 1 2 Shets-$heet 1 Jfl. szdam,

INVENTOR.

July 12, 1949.

Filed July 8, 1946 J. A. SALDANA I DOOR LOCK CONTROL 2 Sheets-Sheet 177' 7' ORA/E V6.

Patented July 12, 1949 UNITED STATES T-ENT. OFFICE 1 Claim.

My present invention relates to an improved door lock control and moreparticularly to a control mechanism whereby two or more doors may besimultaneously locked or unlocked by the movement of a single handle bymanual operation.

The control mechanism of my invention is particularly adapted for use inhomes, hospitals, or other buildings wherein two or more doors areprovided for access to a room as for instance a bath room. It is theprimary purpose of my invention to provide a control as will behereinafter described wherein the user of the room may by a singlemanipulation of one handle lock both doors.

I also provide in addition to the control mechanism an emergency controlby means of which the doors may be unlocked from outside the room ifnecessary.

In the accompanying drawings I have illustrated one complete example ofthe physical embodiment of my invention according to the best mode Ihave thus far devised but it will be understood that various changes andalterations may be made in the exemplified structure within the scope ofthe appended claim.

Inthe drawings:

Figure 1 is an assembly view showing two doors to a room withthe duallocking mechanism for the doors.

Figure 2 is a longitudinal vertical sectional view of one of the boltsand its associated handle control box.

Figure 3 is a transverse sectional view taken at line 33 of Figure 2.

Figure 4 is a longitudinal sectional View of the other handle controlbox.

Figure 5 is a transverse sectional view thereof at line 55 of Figure 4.

Figure 6 is a horizontal sectional view of the corner control box.

Figure '7 is a vertical sectional view thereof at line 7-1 of Figure 6.

Figure 8 is an enlarged vertical transverse section through theemergency control box.

Figure 9 is a section on line 9-9 of Figure 8.

Referring now to the drawings in detail, I have illustrated a room 2which may be a bath room or any other room in a building having aplurality of doors and requiring privacy.

The room 2 illustrated has walls 4 and doors 6 and 8 are shown in therespective walls of the room, and provided with the conventional doorknobs 9. The corner of the room I0 is formed by the partitions l2 andI4, and the control mech- 2 anism of my invention is. shown as mountedin and associated with the wall partitions, it being understood that.the mechanism is preferably mounted as the building constructionprogresses although it is possible to mount the mechanism in existingstructures.

A control box [.6 is. mounted in the wall l2 and is provided with anattaching plate I! for securing the box to the partition I2. In this boxis an operating shaft l8 having an end protruding through the partition[2 and carrying a handle 20 which can be secured thereon by screws 2i. Alever 22 is mounted on and is rotatable with the shaft and has an. upperand lower yoke 23 into which are pivotally connected the links 24 and30.

The link 24 is. formed with an internally threaded collar 28; receivingand retaining the rod 28. The link 30 has a collar 32 engaging a rod 34having a bolt 36 slidable in gu de 38 which is secured to the door jambby screws 49.

The rod 28 is. extended ow a corner box 50 and engages an internallythreaded collar 42 on a link 44, and this link is pivotally connectedwith the angle, lever or pivot plate .46 which plate is. pivotallysecured as at 48 in the corner box 58. Attachingplate 52 of the box issecured at 5Ato the partitions. l2 and M at the corner formed thereby.

It is to be understood that the mechanism thus far described is solocated that the operating handle 20 is placed where it can easily beactuated by a person adjacent a door to be locked or unlocked. A similarhandle control mechanism can be located adjacent to the other door butthis mechanism is disposed so that the mechanism thereof is inverted ascompared with that in the box IE. This second handle control mechanismincludes a box 63 adapted to be attached to the partition I as indicatedat 62 and is provided with a shaft 64 corresponding to the shaft 18. Theshaft 64 has a handle 65 joined thereto and located within the roomadjacent to the door 8, so that by turning the handle, shaft 64 can berotated or oscillated. This shaft 64 has an arm 66 extending upwardlytherefrom provided with a yoke or fork at its upper end in which a link68 is pivotally mounted. A collar ill couples one end of this link to arod 12 which corresponds with rod 23 and extends to and is pivotallyjoined to plate 46 by a collar 14 carried by a link 16. The other end ofthe link 68 is joined at E8 to a bolt slidable in a guide 82 similar toguide 38 and similarly secured in the jamb of door 8 and positionedwhere it can engage the door 8 when said door is closed. A handle 65 issecured to the shaft 64 and by means thereof said shaft can be rotatedpartly in one direction or the other so as to cause the arm 66 to pushor pull the rod 12 and thereby transmit motion through the angle leveror pivoted plate 46 to rod 28 and the bolt 35 through the mechanismcontained within the box l6 which has already been described. Operationof the handle 20 will similarly actuate both bolts either tosimultaneously unlock the doors or to lock them after the doors havebeen closed.

In addition to the door operating mechanism there is provided anemergency control accessible from a suitable point outside of a room inwhich the handles 20 and 65 are located. This emergency control includesa box 85 which is located in a partition, such as M and has a normallyclosed and locked door 86 which can be reached from a point outside ofthe room in which the handles are located. In this box the knob 88having a stem 90 which is slidable within guide slots 92 and is weldedor is otherwise fixedly joined to rod 12 or to rod 28 or other partsactuated by the handles 20 and 65, in case of emergency, the door 86 canbe opened or broken, knob 88 grasped and pressed to the right or to theleft and motion thus transmitted to the rods for the purpose of shiftingthe bolts and unlocking the doors.

An added feature can be the provision of an electric lamp locatedoutside of the room containing handles 20 and 65. This lamp indicated at94 can be located in a house circuit and by means of a movable switchmember 96 carried by one of the rods of the apparatus, such as rod 28,the circuit to the lamp will be closed When the doors are locked,thereby indicating to persons outside of the closed room that the roomis occupied.

It will be seen that the dual door control mechanism may with facilitybe installed and used wherever privacy and dual door control isdesirable and the mechanism embodied in my invention will providetroublefree means for carrying out such a purpose. The linkage is sodesigned that little physical effort is required to operate the linkageand a positive and efiicient control is thus provided. It will beobvious that the mechanism of my invention is not confined 4 in use tocorners or rooms or to two doors, and may well be installed in otherstructural arrangements.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is:

A dual door control for oppositely hinged doors spaced apart by apartition comprising a bolt slidably mounted for reciprocation in eachend of the partition, a link fixedly connected at one end to the innerend of one bolt, an operating control box mounted inside the partition,the link being extended into said box, a lever fulcrumed at its centerwithin the box and pivotally connected at one end to the link, anoperating shaft extending from the lever and outside the partition forswinging the lever in either direction, a series or fixedly connectedlinks pivotally connected at one end to the other end of said lever formovement in one direction simultaneous with movement of the first linkin an opposite direction, a direction changing control box mountedwithin the partition and into which the other end of said series oflinks extends, a pivot plate within the direction changing control boxand to which said other end of the series of links is pivotallyconnected, a second series of fixedly connected links pivotallyconnected at one end to the pivot plate and fixedly connected at theother end to the other bolt, a second operating control box mountedinside the partition and past which said second series of links isextended, a lever extending from the second operating control box andpivotally connected to said second series of links, and an operatingshaft for the last named lever extending outside the partition.

JUAN ANGEL SALDANA.

REFERENCES CITED The following referenlces are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 779,173 Merritt Jan. 3, 19051,133,659 Page Mar. 30, 1915 1,136,141 Kelley Apr. 20, 1915 2,173,148Anderson Sept. 19, 1939 2,413,025 Marine Dec. 24, 1946

